Inficon 3PE5-001-B7HZ, Operating Manual

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tinb60e1 (2020-07)
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network master is achieved. The NET status LED will then
become solid green indicating the connection is complete.
4.4 Initial Setup
Two of the most important steps for the initial setup of the gauge
are to set atmosphere (SET ATM) set zero (SET VAC) and as
described in the Programming section 4.6.4 below. This will
ensure proper operation of the gauge and accurate pressure
measurements. The gauge is calibrated at the factory using
nitrogen. Furthermore, the gauge is also installed in a certain
orientation when calibrated at the factory. Without setting zero
and atmosphere after the gauge is installed in your system, the
gauge may not display the expected and correct pressures. This
could be caused by the fact that you may be using a different
gas than Nitrogen such as air to setup and calibrate the gauge
(most commonly the case) and the gauge orientation is different
than the orientation used at the factory. As such, it is very
important to perform your own initial setup and calibration by
setting zero and atmosphere with the gauge installed in your
actual system. Please note the following:
Setting Atmosphere (SET ATM)
Setting atmosphere is the most important step for a newly in-
stalled gauge. If you prefer to use air to set atmosphere, vent
your vacuum system chamber to expose the gauge to the local
atmospheric pressure (air) and set atmosphere to match your
known local uncorrected barometric pressure (air). This is the
reading of ambient air pressure you will expect if you were to
vent and open your vacuum chamber to the atmosphere sur-
rounding the outside of your chamber. At sea level, this pressure
is usually near 760 Torr. At elevations above sea level, the pres-
sure decreases. Check your local aviation authority or airport
web sites or your current local weather conditions online to help
find your local uncorrected barometric pressure if you do not
have this information. See "SET ATM" in section 4.6.4.